For New Generation of Power Plants, a New Emission Rule From the E.P.A.

Amy Sancetta/Associated Press

A coal-fired power plant in Ohio. New coal plants will face hurdles under the proposed rule.

By FELICITY BARRINGER

The Obama administration’s proposed rule to control greenhouse gas emissions from new power plants — the first ever — could go far toward closing out the era of old-fashioned coal-burning power generation.